<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>对象方法扩展</title>
</head>

<body>
    <script>
        // 1. Object.is 判断两个值是否[完全相等]
        console.log(Object.is(120, 120)); // true
        console.log(Object.is(NaN, NaN)); // true
        console.log(NaN === NaN); // false

        // 2. Object.assign 对象的合并
        const config1 = {
            host: 'localhost',
            port: 3306,
            name: 'root',
            pass: 'root',
            test: 'test'
        };
        const config2 = {
            host: 'http://atguigu.com',
            port: 3366,
            name: 'atguigu.com',
            pass: 'iloveyou',
            test2: 'test2'
        }
        console.log(Object.assign(config1, config2));

        // 3. Object.setPrototypeOf 设置原型对象  Object.getPrototypeof
        const school = {
            name: '尚硅谷'
        }
        const cities = {
            xiaoqu: ['北京', '上海', '深圳']
        }
        Object.setPrototypeOf(school, cities);
        console.log(Object.getPrototypeOf(school));
        console.log(school);


    </script>
</body>

</html>